<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>Monica & Rock</title>
<style>
    .center-flex{
        width: 100%;
        height: 64px;
        min-width: 640px;
        display: flex;
        justify-content: center;
        align-items: flex-end;
    }
    .big-font{
        font-size: xx-large;
    }
</style>
</head>
 
<body>


    <div id="app">
        <div><span class="big-font">今天是我们在一起的</span></div>
        <div class="center-flex">
            <div><span class="big-font">第</span></div>
            <div id="nums"></div>
            <div><span class="big-font">天</span></div>
        </div>
    </div>

</body>
 <script src="js/jquery-3.6.0.min.js"></script>
 <script src="js/nums.js"></script>
 <script src="js/index.js"></script>
</html>